The component parts and main functions of the electronic map system of automobile navigation are analyzed in this paper .
本文分析了车载电子地图系统的组成和基本功能；
Basing on such GIS data model, we design a GIS electronic map system, which contains most basic GIS functions, such as object-create, map zoom, wandering, query and so on.
运用此模型，设计了一个基本的GIS电子地图实验系统，实现了GIS中地图对象的创建、地图的漫游、缩放、查询等功能。
Aiming at the requirements of different users, it divided the 3d electronic map system into design system and browse system, and detailedly discussed the overall structure of 3d electronic map system.
针对不同用户对象的需求，将3维电子地图系统具体划分为设计系统和浏览系统两部分，并在此基础之上详细阐述了3维电子地图系统的总体结构。
The Map Symbol base System is one of the indispensable base functions in Electronic Map System.
地图符号库系统是电子地图系统中不可缺少的功能模块之一。
The Map Symbol base System is one of the indispensable base functions in Electronic Map System.
地图符号库系统是电子地图系统中不可缺少的功能模块之一。
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